Office 365 Cutover Migration - Logistics and Post-Migration Strategy
Posted on 2015-01-19
Greetings. I'm getting ready to complete our cutover migration (using Microsoft's migration batch).
I've been told that the best way to finalize this is to switch our MX records (Autodiscover, too) on a Friday night, confirm mail routing to Office 365, then assist users on Monday morning. I am presuming the suggestion implied that users should switch to Outlook online after the MX switch is completed (some time late Friday or early Saturday - we use Network Solutions which is pretty quick with this).
1. We have 70 users, all with laptops, all out of the office on the weekends. Is it preferable to actually stop MS Exchange services on our On-Premises server after the MX record switch ? When they come in Monday morning, we'll be waiting for them, but over the weekend, they may try to create messages in their current Outlook profiles vs. using their Office 365 online Outlook.
2. Once the MX record (and Autodiscover) are switched, does the migration batch still communicate with the on-premises server for incremental updates ? (this isn't really clear in any of the documentation I read). If so, and if I should let it continue for another day or so, that would preclude Question 1 above, yes ?
3. I have a password sync (third party) in place, so I don't need to maintain the on-premises server for dir sync at this time. I don't want to fully power it off though. Are there certain services I should stop right after the migration is completed that would not interfere with Question 2 above ?